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Construction method for accurate locating small distance air face hole-drilling

A technology of precise positioning and construction method, applied in the field of drilling, can solve the problems such as the difficulty of drilling hole opening accuracy to meet the requirements of high-precision positioning, low hole formation rate, difficulty in precise positioning and smooth opening, etc. High porosity and easy production

Inactive Publication Date: 2012-11-07
CHINA GEZHOUBA GROUP CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the construction of core drilling, due to the influence of factors such as the high hardness of the drilling object and the large swing force of the drill pipe, according to the conventional construction method, it is difficult to accurately locate and achieve the purpose of smooth drilling, especially in small distances. When the empty surface requires very high positioning accuracy, the drilling accuracy is difficult to meet the high-precision positioning requirements, and the hole forming rate is very low

Method used

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  • Construction method for accurate locating small distance air face hole-drilling

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Embodiment Construction

[0018] Such as figure 1 As shown, the present invention's precise positioning small free surface drilling construction method is implemented in four steps:

[0019] 1. Make the hole mold

[0020] According to the size of the drilled hole, select steel plate or section steel as the material for making the mold, and then drill holes on the section steel or steel plate according to the size of the hole; in order to facilitate the fixing of the hole position mold 3, weld steel feet 4 on its four corners, and set up a fixed hole.

[0021] 2. On-site hole position setting out

[0022] According to the requirements of the design drawings, use measuring instruments to release the center line of each hole position and clearly mark it.

[0023] 3. The hole position mold is fixed

[0024] Precisely position the hole mold according to the setting-out position of the on-site hole to ensure that the center line of the positioning hole on the mold is aligned with the center line of the o...

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Abstract

The invention discloses a construction method of precisely positioning minor distance free face drilling, comprising the following steps of: selecting steel plate or profiled bar as the materials for making die according to the dimension of the aperture of a drill hole, drilling holes on the steel plate or profiled bar according to the aperture; pulling out and marking the center lines of each hole with a measuring apparatus according to requirements of design drawing; precisely positioning a hole die according to the position of the pulled center line of each hole on site so as to ensure thecenterline of the positioned hole on the die to be aligned with the centerline of the hole on site, then fixing the holes with steel support feet welded on the hole die and using expansion bolts to fix the holes on a base plane so as to secure the die; mounting a core drill, placing a bit at a corresponding center of hole and drilling, a set of fixture is arranged on the drill pipe to avoid drillpipe swaying during drilling and pressing lightly and rotating slowly when drilling so as to reduce the vibration of the drill. The construction method solves the problem of low drilling rate of holes on free face with minor distance and poor precision of holes drilled and is an economical and practical drilling construction method.

Description

technical field [0001] The invention relates to a drilling method, in particular to a construction method for precisely locating small-distance drilling on the air surface. Background technique [0002] In the construction of core drilling, due to the influence of factors such as the high hardness of the drilling object and the large swing force of the drill pipe, according to the conventional construction method, it is difficult to accurately locate and achieve the purpose of smooth drilling, especially in small distances. When the empty surface requires very high positioning accuracy, the drilling accuracy is difficult to meet the high-precision positioning requirements, and the hole formation rate is very low. Contents of the invention [0003] The object of the present invention is to provide a construction method for precisely positioning small-distance drilling on the air surface, which can overcome the swing of the drill rod when the drilling rig is drilling, and ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/04E21B15/04
Inventor 程志华刘志文石义刚
Owner CHINA GEZHOUBA GROUP CO LTD
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